He is only killing people with cancer, something he has an exceptional ability to diagnose. He seems capable of sensing cancer within a person without an examination. Leonard requires the cancerous cells to live and to regenerate. Betts grabs her from behind and tosses her into the ambulance, shutting the doors behind them. As he advances, scalpel drawn, he says, "I'm sorry. But you've got something I need." Scully's surprise and fear is replaced by shock and recognition. His words can mean only one thing. She has cancer. "You did a good job, Scully. You should be proud." Scully's only reply is, "I want to go home." Mulder has no way of knowing yet what she herself has ascertained. She touches the spot of blood then her nose as the reality of her situation sets in. The clock on her bedside table reads 2:08. Possibly a reference to the eighth episode of season two, "One Breath".

Leonard Betts This X-File concerns a man, Leonard Betts, who seems impervious to injury or death; capable of regenerating himself. Near the end of the episode we see him approach a man who appears to be a heavy smoker. Before he kills him Betts says, "I'm sorry. But you've got something I need." We learn that he is only killing people with cancer, something he has an exceptional ability to diagnose. He seems capable of sensing cancer within a person without an examination. Leonard requires the cancerous cells to live and to regenerate. When the partners finally track down Betts, he's been at his mother's house and removed some cancerous tissue from her at her request to strengthen himself. She's still alive and Scully goes in the ambulance with her while Mulder stays at the house to continue the search for Betts. What they don't know is that Betts is hiding on top of the ambulance. Scully is on her cell phone to Mulder as Betts' mother is taken from the ambulance into the hospital. As Scully steps out, something drips from the roof of the ambulance onto her head. Realizing that Betts has been on the roof, she tells Mulder to get over to the hospital immediately. She draws her gun and begins to climb onto the roof of the ambulance when Betts grabs her from behind and tosses her into the ambulance, shutting the doors behind them. As he advances, scalpel drawn, he says, "I'm sorry. But you've got something I need." Scully's surprise and fear is replaced by shock and recognition. His words can mean only one thing. She has cancer. After a fight in the ambulance where Scully prevails, Betts lies dying. Later, Mulder finds Scully sitting silently and forlorn in the car and brings her the news that Betts has been pronounced dead. He tells her the mother will recover and Scully inquires whether she had cancer. The confirmation of this causes Scully to turn away and Mulder, trying to be supportive says, "You did a good job, Scully. You should be proud." Scully's only reply is, "I want to go home." Mulder has no way of knowing yet what she herself has ascertained. The episode ends with Scully waking in bed in the early hours of the morning. She has a persistent cough and there is blood on her pillow from a bloody nose. She touches the spot of blood then her nose as the reality of her situation sets in. The clock on her bedside table reads 2:08. Possibly a reference to the eighth episode of season two, "One Breath". This was when Scully was returned in a near death state following her abduction and the experiments that are most certainly the cause of her current condition.